Finding the Fourth Proportional to 13,641.57, 18,818.69 and 8,327.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,641.57 : 18,818.69 = 8,327.16 : x
2. Step 2: Convert to fraction form
   13,641.57/18,818.69 = 8,327.16/x
3. Step 3: Cross multiply
   13,641.57x = 18,818.69 × 8,327.16
4. Step 4: Simplify right side
   13,641.57x = 156,706,200.98
5. Step 5: Solve for x
   x = 156,706,200.98/13,641.57
6. Step 6: Final answer
   x = 11,487.40